Home / 690,906.90-1,036,360.35-490,140.30

Finding the Fourth Proportional to 690,906.90, 1,036,360.35 and 490,140.30

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Solution

The fourth proportional to 690,906.90, 1,036,360.35 and 490,140.30 is: 735,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,906.90 : 1,036,360.35 = 490,140.30 : x
  2. Step 2: Convert to fraction form
    690,906.90/1,036,360.35 = 490,140.30/x
  3. Step 3: Cross multiply
    690,906.90x = 1,036,360.35 × 490,140.30
  4. Step 4: Simplify right side
    690,906.90x = 507,961,972,857.11
  5. Step 5: Solve for x
    x = 507,961,972,857.11/690,906.90
  6. Step 6: Final answer
    x = 735,210.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.